Typos in tennis_court_keypoints_training.ipynb

[lucarubini]

There are 2 typos in https://github.com/abdullahtarek/tennis_analysis/blob/main/training/tennis_court_keypoints_training.ipynb

1. kps = np.array(items['kps']).flatten() should be kps = np.array(item['kps']).flatten()
2. devic = torch.device("cuda" if torch.cuda.is_available() else "cpu") should be device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

[lesurfe]

I'd like to add a third one: torch.save(model.stat_dict(), "keypoints_model.pth") should be torch.save(model.state_dict(), "keypoints_model.pth")